CVE-2026-32886
Parseplatform Parse-Server ≤ 8.6.47
Raw vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XSummary
CVE-2026-32886 is a high-severity Prototype Pollution (CWE-1321) vulnerability in Parseplatform Parse-Server. Its CVSS base score is 8.2 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 41th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
CVE-2026-32886 is a stack overflow vulnerability in Parse Server, an open source backend deployable to any Node.js-compatible infrastructure. Versions prior to 9.6.0-alpha.24 and 8.6.47 are affected, where remote clients can crash the Parse Server process by invoking a cloud function endpoint with a specially crafted function name. This name traverses the JavaScript prototype chain of a registered cloud function handler, leading to the overflow. The issue is classified under CWE-1321 with a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
Any unauthenticated remote attacker can exploit this vulnerability over the network with low complexity and no user interaction required. By sending a request to the cloud function endpoint using the crafted name, the attacker triggers recursive property lookups along the prototype chain, resulting in a denial-of-service condition that crashes the server process and disrupts service availability.
The security advisory and associated pull requests detail the mitigation: upgrade to Parse Server versions 9.6.0-alpha.24 or 8.6.47, which restrict property lookups during cloud function name resolution to own properties only, blocking prototype chain traversal. No workaround is available. Relevant resources include the GitHub security advisory GHSA-4263-jgmp-7pf4 and pull requests #10210 and #10211.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-12989
Vulnerability Data
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.6.0-alpha.24 and 8.6.47, remote clients can crash the Parse Server process by calling a cloud function endpoint with a crafted…
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function name that traverses the JavaScript prototype chain of a registered cloud function handler, causing a stack overflow. The fix in versions 9.6.0-alpha.24 and 8.6.47 restricts property lookups during cloud function name resolution to own properties only, preventing prototype chain traversal from stored function handlers. There is no known workaround.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Control response
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V15.3.6
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Secure SDLC practices directly require input validation and safe property assignment to prevent prototype pollution.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.
Security testing in development catches prototype-pollution flaws before release.
Secure development lifecycle mandates input validation and object-handling controls that directly prevent prototype pollution.
Application security requirements explicitly call for safeguards against unsafe object attribute manipulation.
Secure architecture principles reduce the likelihood of prototype pollution through safe design patterns.
Secure coding standards directly prohibit unsafe prototype attribute assignment and require defensive checks.
Change-management processes ensure security fixes for prototype-pollution issues are tracked and deployed.